Engraving-machine.



No. 658,820. Patented Oct. 2, I900. E. S.- WO0DS.' ENGBAVING MACHINE.

(Application filed Jan. 30. 1899.) (No Model.) 5 Sheets-Sheet l.-

Patented Oct. 2, I900. E. S. WOODS. ENGRAVING MACHINE.

(Application filed Jan. 80, 1 899.] (No Model.) 5 Sheets-Sheet 3.,

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No. 658,820. Patented Oct. 2, I900. E. s. w00ns. I ENGRAVING MACHINE.

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ENOCH S. WOODS, OF HARTFORD, CONNECTICUT.

ENGRAVlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 658,820, dated October 2, 1960.

Application filed January 30,1899. Serial No. 703,782. No model-l To all whom it may concern.-

Be it known that I, ENOOH S. Woons, a citizen of the United States, residing at Hartford, in the county of Hartford, State of Connecticut, have invented certain new and useful Improvements in Machines for Engraving and Copying, of which the followingis a specification, reference being had to the accompanying drawings, showing an embodiment of my invention.

Similar reference characters designate like parts in the several views.

One object of my invention is to producea machine for engraving and copying, such as .a die cutting or sinking machine for making a counterpart in hard or soft material of a pattern or model which may itself be of hard or soft material and may have irregular, concaved, or conveXed surfaces.

A second object ofmy invention is the production of a die cutting or sinking machine in which the inward and outward movements of the tool are automatically controlled, preferably through the instrumentality of electrically-controlled devices included in circuit with electrical contacts operated by or through the model or pattern.

A third object of my invention is the production of a machine for engraving and copying, such as a die cutting or sinking machine, in which a tracer for following the contour of a model or pattern controls the operation of a tool to and from the work through the instrumentality of electrical connections from the tracer to electrically-controlled devices carrying the tool.

A fourth object of myinvention is the production of a machine for engraving and copying, such as a die cutting or sinking machine, for reproducing the work in either an exact or a reversed form,-as desired, and in which the reproducing devices are electrically controlled.

The machine herein shown and described (illustrating one embodiment of my invention) comprises in. part a suitable bed or framework, a rotatable tool and tool-holder supported by a suitable tool-slide adapted to be moved vertically, longitudinally, and crosswise of the machines, a tracer loosely mounted on the tool-slide and controlling the backward and forward movements of the tool and its holder by means of electromagnets carried by the tool-slide, a model-holder and a workholder mounted one above the other and provided with means whereby they may be simultaneously oscillated or the angular plane changed while retained in exact parallelism, all as hereinafter described.

In the accompanying drawings, Figure l is a front elevation of a die cutting or sinking machine, showing the model-holder and the work-holder with the connections for moving both simultaneously, the tracer with electrical contacts, the tool and its holder with electrically-controlled devices, and the circuit connections for moving the spindle inward and outward. Fig. 2 is an end view looking at the right-hand end of the machine. Fig. 3 is a top view looking down upon the machine. Fig. 4 is a section of the machine on the lines 4 4 of Fig. 1. Fig. 5 is an end view of a form of machine employing modified electrical connections. Fig. 6 is a similar View of said machine having the reverser extension applied thereto. Fig. 7 is a perspective view of the tracer and guide. Fig. 8 is a perspective view of the removable contact-plate. Fig. 9, see Sheet 1, is adiagrammatic view of the electrical contacts and the electromagnets operated thereby.

lOdesignates the bases of the machine, supported above the floor of the shop by legs 11 and 12.

13 designates a rotatable support for the model-holder and the work-holder, hereinafter described. Said support is gibbed for rotation to the bed and is provided with the worm-teeth l3, meshing with a worm 18, secured to a shaft 19, having a squared end at the front of the machine. Rigidly supported upon the table 13 are two parallel uprights 1a and 15. (See especially Fig. 2.) Said uprights-may be integral with the support, or, if independent, rigidly bolted thereon. The uprights 14 and 15 support a model-holder 16 and work-holder 17. The model-holder and the work-holder each comprises anopen frame, the first being trunnioned by trunnions 1t 16 in the uprights 14 15 and the second being similarly trunnioned by trunnions 17' 17 and the trunnions of both frames being parallel with each other. The model-holder is pro-' vided with two rearwardly-extending arms the arm 1.6 through the employment of a link i 22, connected at itsupper end to the arm 17 of the work-holder by a pivot 21 and connected at its lower end by pivots 23 to an extension of a vertical reciprocator 24. (See Figs. 1 and 3.) Said reciprocator extends downwardly through the rotatable support 13 and is arranged to have vertical movements through the same for the purpose of simultaneously tilting the model-holder and the work-holder.

The means shown in the accompanying drawings for giving the vertical movements to the reciprocator 24 are as follows, especial reference being had to Figs. 1 and 4 accompanying: Upon the lower reduced end, Fig. 1, of the reciprocator 24 there is revolubly fitted a yoke 25, having threaded openings near to both ends. Downwardly-extending screws 26 26 pass through the threaded openings of the yoke, and these screws are held against vertical movements by means of hubs 26 26. (Shown dotted in Fig. 1.) Upon the upper end of each screw-shaft is a bevel-gear 27, and these wheels mesh with the bevel-gears 28 28, secured to short shafts 29 29, to the opposite ends of which are secured gear-wheels 30 30. The last-named Wheels mesh with a single gear-wheel 31, rigidly secured to a shaft extending to the outside of the machine and having a squared outer end.

holder and the work-holder may be tilted to any desired degree, and the uprights 14 15,

carrying the same, may be rotated as desired.

The machine is provided with a tool 45, arranged to be revolved to have movements to and from the work secured to the work-holder,

to have vertical movements,andto have'movements across the machine. The result is that the tool can take any direction over the face of the work secured to the holder and the whole be directly under the control of the operator.

Extending upwardly from the base 10 is a main slide 35, having side ribs along its lower edges, said ribs fitting the gibs 36 and 37, extending across the machine. (See Figs. 1, 2, 3, and 4.) Extending downwardly from the bottom of the main slide and through an opening cut through the base 10 is a threaded lug or rib 3S, and through said lug or rib there passes ascrew 39, secured against lengthwise movements and having its outer end squared to facilitate rotation. By this means the crosswise movements of the main slide are controlled.

Fitted upon the main slide and adapted to have vertical movements at right angles thereto is a second or vertical slide 40, arranged to carry the spindle-frame and the means for electrically controlling the same, as herein- Motion is communicated to after described. The main slide is provided with vertical dovetail grooves, (see Figs. 3 and 4,) and the vertical slide has a broad vertical rib 40, provided with corresponding dovetail ribs fitted therein. Movement is given to the vertical slide by means of a screw 41 passing through the broad vertical rib 40, and this screw is rotated by means of a bevelgear 42 at its lower end. This wheel meshes with a bevel-gear 43, secured upon one end of a rotatable sleeve journaled in a frame secured to the under side of the main slide 35. Said sleeve is arranged to have a sliding connection upon a rotatable shaft 44, having its end outside of the frame squared.

The vertical slide is provided with a shelf 99 for directly supporting the spindleframe and is also provided with two triangular extensions 97 98 (see Fig. 1') for supporting the electromagnets. The spindle-slide 45, mounted upon said shelf, is provided with two spindle-supports 45 45", which support the driving-shaft of the spindle and the driving-pulley 92. The support 45 is provided with an upward extension 46 for carrying the indicator and contacts, as hereinafter described. The floor of the shelf 99 is slotted, and through the said slot extends the rib 50, to which is pivoted a link 51. At its other end said link is pivoted to an oscillating arm 52, forming part of an armature-frame pivoted upon a pin 53.

Upon the extremeend of the extension 46 there is a horizontal guide 46 for guiding a tracer 47, having a pointed forward end and pivoted at its rear end upon a block or slide By the means above described the model- 121, snugly fitting in a slot 120 of a central contact48. Immediatelybelowthelowerend of said contact there is an insulating-block 54, and the lower free ends of the side contacts and 56 bear against said insulatingblock. The lower end of the central contact 48 is provided with right and left extensions, maintaining the electrical circuits closed through all of the contacts normally. The central contact 48 is permanently connected at its upper end with a wire 102, leading to a battery 101. The right-hand contact *56 is connected with a wire 105, thence by two short wires 106 and 107 to magnet-coil 94 (on the armature) and to the fixed magnet-- coil 96, t'hence by short wires to a wire 104, connected to a battery 101, and the left-hand contact 55 is connected with a wire 103, thence by two short wires 108 and 109 to magnetcoil 93 (on the armature) and to the fixed magnet-coil 95, and thence by short wires to the return wire 104. It will thus be seen that when the contacts 48, 55, and 56 are in nor-' holder 16, and the work in which the reproduction is to be made is secured to the workholder 17. The tool is then adjusted to have its point directly in line with the point of the tracer 47. Any desired motion, vertically or crosswise of the machine, can be produced by turning either or both of the shafts 39 and 44, and as the tracer 47 is caused to be moved over the convexed or concaved surface of the model the contact 48 is continuously caused to be vibrated, thereby making and breaking first one and then the other electrical circuit, causing the armature of the magnets to be continuously oscillated and the motion thereof to be transmitted to the tool-slide. Thus the tracer and tool are caused to approach and recede together.

The foregoing machine arranged as described is adapted to the reproduction of work in an exact forinintaglio from intaglio or relief from relief. My invention, however, also includes machines which reproduce the work in either the exact form or the reverse form, as desired by the workman.

Figs. 5.and 6 illustrate a form of machine which may be employed for reproducing the work in either the exact or the reverse form. In the particular embodiment illustratedthe contacts 48 55 56 are not attached to the upright 46, but are pivoted on a contact-plate 91, having a groove in its rear side adapted to engage a cross-rib 90 at the upper end of the upright 46, enabling the contact-plate to be readily attached or detached for the purpose hereinafter described. The preferred contact-plate consists of a plate 91, of insulating material or having an insulating-surface. Near the upper edge of the plate are pins, upon which the contacts 48, 55, and 56 are pivoted, and at each side edge is an extension 74 with an opening 73 therethrough (see especially Fig. 8) for engaging and looking the swinging tracer guide 46. Said tracer-guide comprises a body 46*, having an opening therethrough, and has an open extension 75 at each of its opposite sides. (See Fig. 7.) In Fig. 5 the tracer-guide is shown as swung to the left side of the contact-plate, so as to bring the lower extension 75 of the guide over the left-hand extension of the contact-plate 91,with the openings in both extensions in aliuemeut and with a screw or bolt passing therethrough and locking the tracerguide in position for reproducing the work in exact form. The electrically-controlled devices and connections therefor are diiferent from those hereinbefore described and shown in Fig. 1. In that figure only one of the fixed magnets 95 96 is efficient when the tracer is moved for the purpose of operating the toolslide, while in the arrangement of Figs. 5 and 6 both of the fixed magnets 87 88 exert an influence on the movable magnet when the tracer is moved, one magnet attracting, while the other repels. The coil of the movable magnet 89 is permanently in circuit by conductors 84 and 85 with the source of current 86. Said conductors 84 and 85 also constitute the common outgoing and return wires for the system. From conductor 85 there extends a short conductor 83, terminating at the middle contact 48 on the contactplate 91. The fixed magnets 87 and 88 are each wound with two coils running in opposite directions. One coil of each magnet is in circuit with one of the side contacts of the contact-plate 91, while the remaining coil of each magnet is in circuit with the other side contact of the contact-plate, the arrangement being such that when the contacts of the plate 91 are in normal position both coils of both magnets are in circuit and the magnetic circuits set up in the cores thereof oppose and neutralize each other, rendering the same ineffective for moving the movable magnet; but when one of the contacts 55 or 56 is cut out of circuit one coil of each magnet 87 88 is cut out, and the remaining coils set up a single magnetic circuit in the core of each magnet in such manner that one fixed magnet attracts and the other repels the movable magnet.

In the arrangement illustrated in Figs. 5 and 6 contact 55 is connected by wire 82 with one coil of the magnet 88 and by wire 81 with one coil of the magnet 87, and thence by wire 80 to the common return wire 84, and contact 56 is connected by wire 78 with one coil of magnet 87, thence by wire 79 with one coil of magnet 88, and thence by wire 80 to the common return wire 84. In the normal positions of the parts (the positions illustrated) current is passing through the single coil of magnet 89 and also through both coils of both magnets 87 and 88, rendering the cores of the fixed magnets neutral. The lower end of the movable magnet constitutes its south pole. If now the tracer be moved toward the right, the middle contact 48 will be separated from contact 55 and one coil of each magnet 87 88 will be cut out, allowing magnet 87 to repel magnet 89, while magnet 88 exerts an attractive influence, and the tool is drawn away from the surface of the work. As soon, however, as the tracer returns to its normal position all of the circuits will be reestablished and the movable magnet restored to central position.

It is often desirable to reproduce work in a form which is the reverse of the pattern. This may of course be done by takin an impression in plaster-of-paris, papier-mach, or other material applied to the face of the pattern, whereby a new but reversed pattern is produced. This pattern may then be secured within the model-holder 16. My machine is, however, so constructed as to enable the reproduction in a reversed form directly from the original pattern without the necessity of taking reverse impressions. To attain this result, I secure the patternintaglio, for instance-within the model-holder 16, with the pattern facing toward the left. The contactplate 91 having been removed from the rib iications of the same and yet be within my.

of upright 46, an overhanging reverser extension '77 (see Fig. 6) is secured to the upper end of the upright. Such reverser extension is provided at its rear extremity with a rib 76, corresponding in shape to the rib 90 of the upright. Before sliding the contact-plate onto the rib '76 of the extension the tracerguide 46 is disconnected from the left-hand extension '74: of the contact-plate 91 and is swung over to the left-hand side of the plate and lockedin that position. If now the tracer is moved away from the surface of the model, the contacts 48 and 56 will be separated and one coil of each magnet will be cut out, allowing magnet 87 to attract magnet 89, while magnet 88 repels the same, thus moving the tool toward the Work.

While I have herein shown and described two embodiments of my invention, yet I do not desire to be understood as confining my invention thereto, as obviously persons skilled in the art may produce various modiinvention.

I have herein shown and described the use of a'battery and direct connections therewith, for controlling the to-and-fro movements of the spindle-slide. It is to be understood, however, that the substitution of another source of electricity will be within my invention, as will also the use of indirect connections in any of the well-known and suitable ways.

\Vhat I claim is- 1. In a machine of the character described, a reciprocatory tool-holder, a pluralityof electromagnets, and an oscillatory armature connected with and moving said tool-holder and mounted for cooperation with said magnets, substantially as described.

2. In a machine of the character described, a reciprocating tool-holder, a plurality of electromagnets, and oscillating means connected with and moving said tool-holder and operated directly by said magnets to be oscillated thereby, substantially as described.

3. In a machine of the character described, a reciprocating tool-hold er, a plurality of electromagnets, and an oscillatory armatureframe connected with and moving said-toolholder and constructed and arranged to be oscillated by said magnets, substantially as described.

4. In a machine of the character described, a rcci procatory tool-holder, a plurality of electromagnets. an oscillatory armature con nected with and moving said tool -holder and mounted for cooperation with said magnets, electrical contacts, electrical circuits between said contacts and said magnets, and a tracer operatively connected with said contacts, substantially as described.

5. Ina machine of the character described, the combination of pattern mechanism, a work-holder, a reciprocatory tool-holder, a plurality of electromagnets, an oscillatory 4 sasao armature connected with and positively moving said tool-holder to and from the said workholder, and mounted for cooperation with said magnets, electrical contacts, electrical circuits between said contacts and said magnets, and a tracer operatively connected with said contacts, substantially as described.

6. In a machine of the character described, a reciprocating tool-holder, a plurality of electromagnets, an oscillating armature-frame connected with and moving said tool-holder and constructed and arranged to be oscillated by said magnets, electrical contacts, electrical circuits between said contacts and said circuit, and a tracer operatively connected with said contacts, substantially as described.

7. In a machine of the character described, the combination of pattern mechanism, a work-holder, a reciprocating tool-holder, a plurality of electromagnets, oscillating means con nected with and directly moving said toolholder and directly oscillated by said magnets, electrical contacts, electrical circuits between said contacts and said magnets, and a tracer operatively connected with said contacts, substantially as described.

8. In a machine of the character described, a rotatable tool, a reciprocatory holder therefor, a work-holder and a pattern -holder, means for oscillating them synchronously on axes at right angles to that of the tool, means for adjusting the said reciprocatory toolholder in a direction parallel to the plane of the said axes, means for reciprocating said tool holder longitudinally thereof to and from said work-holder, a tracer, and electrical devices controlled by said tracer and governing the reciprocations of said toolholder, substantially as described.

9. In a machine of the character-described, a constantly rotating tool, a reciprocating holder therefor, a work-holder and a patternholder mounted on independent supports, means for oscillating said holders synchronously thereon, means for the simultaneous rotary adjustment of said work and pattern holders arounda common axis at right angles to the axes of oscillation, means for adjusting the said reciprocatory tool-holder in a direction parallel to the plane of the said axes, means for reciprocating said tool-holder longitudinally thereof to and from said workholder, a tracer, and electrical devices controlled by said tracer and governing the reciprocation of said tool-holder, substantially as described.

10. In a machine of the character described, a constantly-rotating tool, a reciprocatory holder therefor, a tracer, electrical cont-acts movable with said reciprocatory holder, electromagnets, and an oscillatory armature therefor connected with and moving said holder, substantially as described.

11. In a machine of the character described, a constantly-rotating tool, a reciprocatory holder therefor, a plurality of electrical contacts, a tracer adapted to move one of said contacts, and electrical devices operatively connected with said contacts and directly and positively reciprocating said tool-holder in each direction, substantially as described.

12. In a machine of the character described, a constantly-rotating tool, a reciprocatory tool-holder therefor, a plurality of electrical contacts, a tracer adapted to move one of said contacts, electrical devices embodying an oscillatory armature connected with said holder and operatively connected with said contacts and directly reciprocating said toolholders in each direction, substantially as described.

13. In a machine of the character described, the combination of a frame for supporting a pattern-holder and a work-holder, means for operating said frame about'a vertical axis, a pattern-holder and a work-holder supported by said frame arranged one above the other, and each adapted to oscillate about a horizontal axis, means for oscillating the patternholder and work-holder simultaneously, a tracer, a tool operating upon the work, a reciprocatory holder for said tool, and electrical devices between said tracer and said reciprocatory tool-holder for controlling the movements of the latter, the said electrical devices embodying electromagnets, and an oscillating armature operated thereby, and

connected with and positively moving the said tool-holder, substantially as described.

14:. In a machine of the character described, the combination of pattern mechanism, a work-holder, a constantly-rotating tool, electromagnets and connections between said electromagnets and said tool for positively reciprocating said tool to and from the work, said connections being moved directly by the magnets, a plurality of movable electrical contacts controlling the circuits to said magnets, and a tracer coacting with said pattern mechanism and moving the said electrical contacts, thereby actuating the tool, substantially as described.

15. In a machine of the character described, the combination of work and pattern holders, a support on one side of said pattern-holder, a tracer removably carried by said support, and a removable supplemental support arranged to be interposed between said tracer and the first-mentioned support whereby said tracer may be operated on either side of said pattern-holder, substantially as described.

. In witness whereof I have hereunto signed my name this 27th day of January, 1899.

ENO CH S. WOODS.

In presence of- HARRY R. KNOX, JOSEPH H. MAURICE. 

